Paper-cutting machine.



-PATENTED NOV. 17, 1903.

N. GRAY, JB. V PAPER CUTTING MACHINE;

APPLICATION FILED NOV. 11, 1901. RENEWED AUG. 22, 1903.

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No. 744,534. PATBNTBD Nov. 17., 1993. E

N. GRAY, JR.

7 PAPER CUTTING MACHINE. APPLICATION FILED NOW 11. E901. RENEWED AUG. 22 1903.

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No. 744,534. PATENTED NOV. 17, 1903. N. GRAY, JR.

PAPER CUTTING MACHINE. 7

APPLICATION FILED NOV.11. 1901. RENEWED AUG. 22, 1903- N0 MODEL. ,4 sums-31mm 4.

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UNITED STATES I Patented November 17,1903.

PATENT OFFICE.

,NIEL GRAY, JR, or 'OSWEGO, NEW YORK.

f PAPER-CUTTING MACHINE.

QPECIFICATION forming part of Letters Patent No. 744,534, dated November 17, 1903.

Application filed November 11,1901. Renewed August 22, 1903.' Serial No. 170,487. (No model.) I

To 00% whom it may concern:

Be it known thatl, NIEL GRAY, Jr., a citizen of the United-State's, residing at Oswego,

in the county of Oswego and State of New York, have invented certain new and useful Improvements in Paper-Cutting Machines;

and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates generally to papercutting machines, and particularly to improvements in the mechanism for operatingthe clamp which holds the work while it is.

being cut; and it has for its object to provide means for bringing the clamp down gently to or upon any height of pile when the clamping is automatic, so as to render the automatic clamping as near like hand-clamping as is possible in machines which are run at the highest practicable speeds.

Also it has for its further object to compress the pile of paper slightly by means of a single-piece clamp before the automatic pressure is applied, so as to force out or expel all the air'from between the sheets constituting the pile, and thus diminish the tendency of the sheets to slide on each other and also to render the action of'the system of gears and of the clamp smooth, so that the automatic pressure mechanism will have full opportunity to exercise its full powerin clam ping the work, and as'a still further object to, secure economy in time when cutting 1ow piles of uniform height, either automatically or by hand, by stopping the clamp at a point slightly above the pile in order to reduce the distance it must travel to reach the pile; and

theinvention consists in the'parts and combi-;

parts hereinafter described and ver on the line 5 5, Fig. 5; Fig. 5, a side elevation of said bell-crank lever; Fig. 6, an enlarged detail plan View of the gear-segment; Fig. 7, a detail side elevation of the fiber ring; Fig. 8, a detail side elevation of Similar letters refer-to similar parts through out all the views.

-Referring to the drawings, A represents the frame of the machine, and B the bed or table upon which the paper rests while being adjusted and out. A clamp 0, made of a single piece or bar, is arranged to slide in 'Ways in the uprights D of the frame and is.

connected at each end to straps E, which carry the toothed racks F at their lower The parts hereinbefore described may boot the usual or any desired construction.

At one end of the crank-shaft Gan eccentricdisk H is mounted, around which is loosely clamped by the'boltsd. a strap I, from which an arm J extends, as shown. At a point at the junction of the arm J and strap I a cup K, having a bottom outlet leading between the strap and the eccentric-disk, is I formed for the purpose of supplying a lubricant to said parts. A cap or cover L excludes dust.

The outer or free end of the arm J is connected to the end of an arm M, which projects from the periphery of a split ring or rim N, (see Fig. 8,) surrounding and adjustably clamped on a split'fibe'r ring or rim 0. (See Fig. 7.) The 'fiber ring 0 is arranged on the hub b of a bell-crank lever, (see Figs. 4 and 5,) which is loosely mounted on a shaft P, having its bearingsin extensions from the frame. The huh I) is provided with the arms or levers Q and R, one of which, Q, as indicated in dotted lines, Figs. 1 and 3, is adapted to engage a lateral projection con the side of a segment-gear S, which is also loosely mounted on the shaft P, the teeth of said segment meshing with a pinion T, mounted on the clamp-shaft U and meshing with one of the racks F, while a similar pinion (not shown) is mounted near the opposite end of said shaft U and engages the other rack.

The action of the above-described mechau ism is as follows: When the machine is started from the position shown in Figs. 1 and 3, the crank-shaft G revolves in the direction of the arrow and through the eccentric and strap pulls the friction-ring N through its arm M slowly when it first starts and attaining its maximum speed when said shaft G has gone through or made one-quarter revolution, when the speed gently decreases again until the shaft has made or completed one-half revolution or another quarter revolution. The friction-ring N, binding through the fiber ring 0 upon the hub b of the bell-crank lever, rotates said hub in the direction of the arrow. This movement causes the end of arm or lever Q to swing upwardly, and through its engagement with projection c rotates the segment S about the shaft P, and at the same time the segment rotates the pinion T and clamp-shaft U, thereby causing the racks F to lower the clamp to the paper. As the clamp reaches the paper, it is pressed gently, but withgradually-increasing power,upon the pile until the resistance of the latter overcomes the frictional contact between the split ring N and the fiber ring 0, when the ring N is forced to swing through its arc, sliding on ring 0 until the crank'shaft G has passed its half-revolution point, at which time the eccentric on said shaft reverses the direction of motion of the ring N, and thus carries the end of arm Q away from the projection c on segment S, so that the clamp is free to be returned to its topmost position. Anysuitable means may be employed to return the clamp to its raised positionsuch, for instance, as shown in Fig. 1-in which 13 represents pockets formed in the side pieces of the frame near the front of the same and opposite each other, and a slot 0 is formed in the contiguous faces of the pockets in which the strap or rack bars D work and through which the arms E of brackets F, secured to the top of the clamp at each end thereof, extend. Through the ends of the arms E rods G extend to and through caps H and are held in place by nuts run on the reduced and threaded ends of the rods, and ahand-wheel is provided for each rod, whereby it may be adjusted to increase or decrease the tension of the springs I, surrounding the rods within the pockets and bearing against arms E of the brackets, as fully described in my United States Patent numbered 680,655, dated Au gust 13, 1901.

If the clamp had come down flush upon the table without a pile upon it, the relative positions of the friction-ring N and the arm or lever B would not be changed, and the clamp would be free to return to its topmost position again without the projection c striking the end of arm or lever Q; but with a pile of paper interposed between the clamp and the table the slipping of the friction-ring N would change the relative positions of said ring and the arm or lever, and in order to return the arm or lever R to its previous relative position with ring N, I provide a stop device for holding the bell-crank lever stationary during the period the ring N is being swung through its are after the resistance has become sufficient to overcome the friction. This device in this instance consists of a pin V, adjustably secured in a bracket W, projecting from the frame and arranged in position to be engaged by the end of said arm or lever B, and thus limit its farther rearward movement or swing. (See Fig. 1.) Further, as a means of relieving the arms or levers Q and R of the effects of blows to which they may be subjected by reason of the return of the clamp to its top position I have devised a means for arresting the clamp O at any desired height in its upward movement. This device is best shown in Figs. 9, l0, and 12 of the drawings, and in which cl represents the cap-piece of the frame, and 0 short shafts, which are journaled vertically near each end of said cap-piece. On the upper end of one of the shafts e a handle f is secured, and on the lower ends of the said shafts bell-crank levers are secured, the long arms g of which are connected by a link it, while the short arms carry the downwardlyprojecting pins t', whereby the said pins may be swung in or out under said cap-piece and into or out of the path of the clamp. In the drawings the pins 1'. are shown in their out position or to one side and out of the line traveled by the clamp, so that the latter may be raised to the top of the frame; but if the pins are swung back and over or in line with the clamp, which may be readily done by turning the handlefin the proper direction, the upward movement of the clamp will be arrested by said pins. In order to provide for arresting the clamp at different heights, the pins are preferably made adjustable as to length, and in Fig. 11 I have shown one way in which this may be accomplished and in which figure t" represents the pin havingits lower end screw-threaded and adapted to enter a screw-threaded socket formed in a cap or head 3'. Thus the head may be adjusted up or down on the screw and secured in its adjusted position by a nut 7c, thereby practically lengthening or shortening the pin, as desired, and enabling the clamp to be arrested in its upward movement at any desired point within the limits of adjustment of the pin and its head. To obtain the best result on any height of pile of paper-2'. e., to make the clamp descend as gently as possible upon the pile-it is necessary to adjust the pin 2" and the stop-pin V with relation to each other so that the end of arm Q just clears the projection c of the segment-gear S when the arm R is in contact with the stop-pin V.

The clamp being in one piece, and therefore having but one set of ways, is more durable and can be depended upon to hold the work accurately longer than when the clamp is divided into two or more partsone for marking 0r gaging the work and the other for compressing it. For nearly all purposes one stop device which will .allow the full travel of the clamp and another which will stopthe clamp one-half way up will secure a gentle enough action to obtain good results; but the adjustable feature'of the pins 7; for the clamp and the stop-pin V for the arm R permits of the best results being obtained in any case, no matter what height pile is being cut.

The arrangement of, the lever h on cappiece (1 is not absolutely necessary except a stop of some such kind is desirable from a mechanical standpoint, so as to relieve the blow this system would give the arm Q in case said arm was alone used to check the clamp in its upward course.

ating the latter, and a stop device for arrest-- ing the clamp at any desired point in its upward movement.

2. In a paper-cutting machine, the combination with a clamp, ofa crank-shaft, a clampshaft in operative connection with said clamp, a friction device for operating said clampshaft, and means, connecting said. friction device and cran k-shaft, forimparting a grad ually-increasing speed to said friction device during the first part of the revolution of said crank-shaft and a gradually-decreasing speed during the latter part of its revolution, whereby the clamp is brought down gently to its work.

3. In a paper-cutting machine, the combito said friction device, means for connecting said friction device to said clamp-shaft to rotate the latter, and a stop device for limiting the upward motion of said clamp.

. 4. In a paper-cutting machine, the combination, with a clamp and racks connected therewith, of a clamp-shaft having pinions meshing with said racks, a segment-gear engaging one of said pinions, a bell-crank lever for operating said segmentgear, a crankshaft, and a friction device operated from said crank-shaft for swinging said bell-crank lever.

5. In a paper-cutting machine, the combination, with a clamp and racks connected therewith, of a clamp-shaft having pinions meshing with said racks, a segment-gear engaging one of said pinions, a bell-crank lever for operating said segment, a friction device for operating said bell-crank lever, a stop for limiting the throw of said bell-crank 1ever, and a crank-shaft foroperating said friction device.

6. In a paper-cutting machine, the combination, with a clamp and racks connected therewith, ofa clamp-shaft, pinions mounted on said shaft to engage said racks, a segmentgear meshing with one of said pinions, an arm for imparting motion to said segment, a friction device for operating saidarm, and a crank-shaft for operating said friction device.

7. In a paper-cutting machine, the combination, with a clamp, and means for arresting the upward movement of the clamp at any desired point, of a bell-crank lever for operating said clamp in one direction, afriction device for operating said bell-crank lever, a crank-shaft for operating said friction device, and means for arresting the return movement of said bell-crank lever.

In testimony whereof I affix my signature in presence of two witnesses.

. NIEL GRAY, JR.

Witnesses:

PATRICK 'CLANCY,

M. H. STILsoN. 

